126391250 has 20 divisors (see below), whose sum is σ = 236910102. Its totient is φ = 50556000.

The previous prime is 126391219. The next prime is 126391253. The reversal of 126391250 is 52193621.

It can be written as a sum of positive squares in 5 ways, for example, as 6466849 + 119924401 = 2543^2 + 10951^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126391253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 49307 + ... + 51806.

Almost surely, 2^126391250 is an apocalyptic number.

126391250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126391250 is a deficient number, since it is larger than the sum of its proper divisors (110518852).

126391250 is an equidigital number, since it uses as much as digits as its factorization.

126391250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101135 (or 101120 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 126391250 is about 11242.3863125228. The cubic root of 126391250 is about 501.8481601908.

The spelling of 126391250 in words is "one hundred twenty-six million, three hundred ninety-one thousand, two hundred fifty".